2321508861 has 24 divisors (see below), whose sum is σ = 3835064064. Its totient is φ = 1325630880.

The previous prime is 2321508859. The next prime is 2321508907. The reversal of 2321508861 is 1688051232.

It is a happy number.

It is not a de Polignac number, because 2321508861 - 2¹ = 2321508859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321508961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81291 + ... + 106071.

It is an arithmetic number, because the mean of its divisors is an integer number (159794336).

Almost surely, 2^2321508861 is an apocalyptic number.

2321508861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2321508861 is a deficient number, since it is larger than the sum of its proper divisors (1513555203).

2321508861 is a wasteful number, since it uses less digits than its factorization.

2321508861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26281 (or 26278 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 2321508861 is about 48182.0387800267. The cubic root of 2321508861 is about 1324.1081191009.

The spelling of 2321508861 in words is "two billion, three hundred twenty-one million, five hundred eight thousand, eight hundred sixty-one".